<!DOCTYPE html>
<html>
<head>
    <style>
        button
        {
            width: 150px;
            height: 50px;
        }
    </style>
    <meta charset="UTF-8" />
    <title>button标签</title>
</head>
<body>
    <button type="button" >我是一个按钮</button>
</body>
</html>